Brother Weldon was the college's headmaster in the 1950s, described as a "progressive thinker" and remembered for his "ambitious building programme" on the school's website.

At the commission Brother John William Chute, also known as Brother Kostka, admitted to sexually abusing a boy in Lismore but the provincial council only handed him a "canonical warning" and shifted him to another school.

The molester was promoted to principal at the new school and Brother Weldon, who was chair of the council at the time, failed to pass on details about the complaint to other provincials, meaning they were unaware of the dangers the sex offender posed.

The findings prompted concern from some members of the Marist College Canberra community, where one of the house groups is known as Othmar House.

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They argued continuing to honour a man who enabled sex abuse sent a bad message to the community.